update = 5;
newplane = 5;
width = 30;
height = 21;

exit:	(  6  0 x ) ( 18  0 x )
	( 29  5 a ) ( 29 13 a )
	( 14 20 e ) (  6 20 w ) ;

beacon:	(  6  5 ) ( 18  5 )
	(  6 13 ) ;

airport: (  8  8 d ) ;

line:	[ (  6  1 ) (  6  4 ) ]
	[ ( 18  1 ) ( 18  4 ) ]
	[ (  6  6 ) (  6 12 ) ]
	[ (  6 14 ) (  6 19 ) ]
	[ ( 28  6 ) ( 15 19 ) ]
	[ (  7 13 ) ( 20 13 ) ]
	[ ( 22 13 ) ( 28 13 ) ]
	[ (  7  5 ) ( 17  5 ) ]
	[ ( 19  5 ) ( 28  5 ) ] ;
